Discount Calculator
Type in the original price and the percent off to see the sale price and exactly how much you'll save before tax.
Final price
$60.00
You save
$20.00
Formula
Final price = Original × (1 − Discount% ÷ 100)
Worked example
A $80 jacket is marked 25% off.
- Savings = 80 × 0.25 = 20
- Final price = 80 − 20 = 60
Answer: $60 (you save $20)
How it works
A percent-off sticker tells you the share of the price that comes off, not the share you pay. Turning the percent into a decimal and multiplying gives you the dollar amount you save.
Subtract the savings from the original price to get the sale price. The same answer comes from multiplying the original by (1 − discount), which is faster when you're stacking math in your head.
Sales tax, shipping, and fees are applied after the discount in most regions, so the in-cart total will usually be a bit higher than the sale price shown here.
Common mistakes
- Adding two percent-off coupons together instead of applying them one after the other.
- Calculating the discount on the post-tax price rather than the pre-tax price the store is advertising.
- Confusing "25% off" with "final price is 25% of original" — they are very different deals.
FAQ
- How do I stack two discounts?
- Apply them in sequence. Two 20% discounts equal 0.8 × 0.8 = 64% of the original price, which is a 36% total discount — not 40%.
- Does the calculator include sales tax?
- No. Apply your local tax rate to the discounted price after the discount comes off.
- How do I work out the original price from a sale price?
- Divide the sale price by (1 − discount/100). A $60 item at 25% off was originally 60 ÷ 0.75 = $80.
- Is a "buy one get one free" the same as 50% off?
- Per item, yes — but only if you actually need both items. If you only want one, the per-unit savings is zero.
- What if the discount is greater than 100%?
- That would mean the store is paying you. Cap the discount at 100% and treat anything beyond as a credit or freebie.